JP2009510687A - Secondary battery manufacturing equipment - Google Patents

Abstract

An apparatus for manufacturing a secondary battery by performing insert injection molding on a part of a battery cell when the battery cell is in a mold.
The apparatus includes a pair of upper and lower molds formed in a shape corresponding to a battery cell. Elastic members are provided on the inner surfaces of these upper and lower molds. These elastic members support the cell body of the battery cell, and are formed in a structure that isolates the non-molded region from the molded region when the battery cell is attached to the upper and lower molds. The secondary battery manufacturing apparatus according to the present invention includes a battery case and a mold when the mold is brought into close contact with the cell body of the battery cell when forming a molding member in a specific area of the secondary battery by insert injection molding. There is an effect that the battery case is not damaged by the contact with the mold, and the insert injection molding material injected into the molding region is not injected into the non-molding region.

Description

  The present invention relates to an apparatus for manufacturing a secondary battery, and more particularly, to manufacture a secondary battery by performing insert injection molding on a part of the battery cell in a state where the battery cell is arranged in a mold. Relates to a device for This apparatus has a pair of upper and lower molds formed in a shape corresponding to the battery cell. Elastic members are provided on the inner side surfaces of these upper and lower molds, and these elastic members support the cell body of the battery cell when the battery cells are attached to the upper and lower molds. In addition, the non-molding region is formed so as to be isolated from the molding region.

  In recent years, secondary batteries that can be charged and discharged have been widely used as energy sources for wireless portable devices. In addition, secondary batteries are of great interest as power sources for electric vehicles (EV) and hybrid electric vehicles (HEV) developed to solve problems such as air pollution caused by gasoline and diesel vehicles that use fossil fuels. Collecting.

  Small portable devices use one or several small cells for each device. On the other hand, medium-sized or large-sized devices such as vehicles require high output and large capacity, and therefore use medium-sized or large-sized battery packs including a plurality of battery cells electrically connected to each other.

  Preferably, the middle- or large-sized battery pack is manufactured as small and light as possible. For this reason, a rectangular battery or pouch-shaped battery that can be integrated with a high degree of integration and has a large capacity for its weight is usually used as a battery cell of a medium- or large-sized battery pack. Specifically, there is a great interest in pouch-shaped batteries that use an aluminum laminate sheet as a battery case.

  FIG. 1 is a perspective view showing a conventional exemplary pouch-shaped battery. The pouch-shaped battery 10 shown in FIG. 1 has a structure in which two electrode leads 11 and 12 protrude from the upper end and the lower end of the battery cell 13. The electrode leads 11 and 12 are provided on the opposite side with respect to each other. The battery case 14 includes an upper battery case portion and a lower battery case portion. That is, the battery case 14 is a two-unit case. An electrode assembly (not shown) is received in a receiving portion 15 formed between upper and lower battery case portions of the battery case 14. The pouch-shaped battery 10 is manufactured by connecting the side portions 14a and the upper and lower end portions 14b and 14c, which are contact areas of the upper and lower battery case portions of the battery case 14, to each other. The battery case 14 is formed in a laminated structure including a resin layer / metal film layer / resin layer. Therefore, the both side portions 14a and the upper and lower end portions 14b and 14c of the upper and lower battery case portions of the battery case 14 that are in contact with each other are replaced with the both side portions 14a and the upper and lower end portions 14b and 14c of the upper and lower battery case portions of the battery case 14. The resin layers can be bonded together by applying heat and pressure to each other. In some cases, both side portions 14a and upper and lower end portions 14b and 14c of the upper and lower battery case portions of the battery case 14 may be bonded to each other using a binder. As for both side portions 14a of the battery case 14, the same resin layers of the upper and lower battery case components of the battery case 14 are brought into direct contact with each other, thereby forming a uniform seal on both side portions 14a of the battery case 14 by welding. On the other hand, for the upper and lower ends 14 b and 14 c of the battery case 14, the electrode leads 11 and 12 protrude from the upper and lower ends 14 b and 14 c of the battery case 14. For this reason, the upper and lower end portions 14b and 14c of the upper and lower battery case portions of the battery case 14 are thermally welded to each other. At this time, the thicknesses of the electrode leads 11 and 12 and their thicknesses are improved to improve the sealing performance. In consideration of the material difference between the electrode leads 11 and 12 and the battery case 14, the film-like sealing member 16 is disposed between the electrode leads 11 and 12 and the battery case 14.

  However, in the pouch-shaped battery 10, the battery cell repeatedly expands and contracts during charging and discharging of the pouch-shaped battery 10. For this reason, the thermal welding regions of the upper and lower ends 14b and 14c, more specifically, both side portions 14a of the upper and lower battery case components of the battery case 14 are easily separated from each other. Furthermore, the mechanical strength of the battery case 14 is low. In order to solve this problem, a method of applying an epoxy resin or a silicone resin to the outer seal region of the battery case 14, a method of attaching the battery to an additional member having sufficient mechanical strength, and the additional members are stacked on each other. A method has been proposed.

  However, the method described above does not provide a high sealing force. Furthermore, when the above-described method is used, the total weight and overall size of the battery pack increase, and the assembly process of the battery pack is very complicated.

  In order to solve the above-described problems, a secondary battery including an electrode assembly for charging and discharging attached to a battery case including a metal layer and a resin layer has been proposed. In this secondary battery, at least a part of a molded portion having a predetermined thickness is formed outside the battery case. This is disclosed in Korean Patent Application No. 2005-0047765 filed in the name of the applicant of the present application. When the secondary battery is a thin battery such as a pouch-shaped battery, the molded part improves the mechanical strength of the battery case and further improves the sealing force in the sealing region. Further, the molded portion can be configured to be stably stacked when a plurality of secondary batteries are stacked on each other to produce a middle- or large-sized battery pack.

  In the case of some small secondary batteries and the above-described secondary batteries, a cap assembly such as a protection circuit is integrally formed in the battery cell by insert injection molding. During insert injection molding, the molded member is formed on a portion of the entire battery cell. At this time, the battery cell is brought into contact with the mold. However, the battery case of the battery may be damaged by such contact. In some cases, a short circuit occurs.

For example, when forming a molding member in a specific area of the battery cell, the remaining part of the battery cell is brought into close contact with the mold so that no insert injection molding material (eg, molten material) is injected. There is a need to. For this purpose, the corresponding areas of the mold and the battery cell must be brought into close contact with each other with a large sealing force. However, the battery case may be damaged during this procedure. When the battery case is damaged, the electrolyte leaks from the battery cell. This may cause a serious accident, particularly in the case of a middle- or large-sized battery pack in which a plurality of unit cells are stacked on each other.
Korean Patent Application No. 2005-0047765

  Therefore, the present invention is provided to solve the above-described problems and other technical problems that have not yet been solved.

  Specifically, the object of the present invention is to damage the battery case when the mold is brought into close contact with the battery cell of the secondary battery while forming the molding member in a specific area of the secondary battery by insert injection molding. It is an object of the present invention to provide an apparatus for manufacturing a secondary battery that can be avoided.

  Another object of the present invention is to provide a secondary battery having a specific shape manufactured by the above-described apparatus.

  According to one aspect of the present invention, these and other objects are provided in an apparatus for manufacturing a secondary battery by performing insert injection molding on a portion of a battery cell when the battery cell is in a mold. It includes a pair of upper and lower molds formed in a shape corresponding to the battery cell, and an elastic member is provided on the inner surface of the upper and lower molds, and the elastic member attaches the battery cell to the upper and lower molds. Sometimes, it can be achieved by an apparatus that is configured to support the cell body of the battery cell and to isolate the non-molded area from the molded area.

  In the secondary battery manufacturing apparatus according to the present invention, the cell body of the battery cell is supported by the elastic member during the insert injection molding process. Therefore, damage to the battery case due to direct contact between the battery cell and the mold is prevented, and the contact pressure of the elastic member is high despite the low pressure, so that a specific region ("" The injection of the insert injection molding material from the molding area “) to other areas (“ non-molding area ”) is effectively prevented.

  Preferably, the battery cell according to the present invention is a thin secondary battery having a small thickness, and the battery cell has a battery case formed of a laminated structure including a metal layer and a resin layer. A typical example of such a secondary battery is a so-called pouch-shaped battery that uses a laminated sheet formed of aluminum and a resin as a battery case. The battery case of the pouch-shaped battery can be formed in various structures. For example, a sheath member of a pouch-shaped battery has a structure in which an electrode assembly is received in a receiving portion formed on an upper inner surface and / or a lower inner surface of one unit foldable member, and upper and lower contact areas are sealed. Alternatively, the electrode assembly may be received by a receiving portion formed on the upper inner surface and / or the lower inner surface of the two-unit folding member, and the upper and lower contact areas may be sealed. A pouch-shaped battery having the above structure is disclosed in PCT International Application No. PCT / KR2004 / 003312 filed in the name of the applicant of the present application. It is assumed that the contents disclosed in this patent application are included in this specification by touching this patent application.

  The electrode assembly includes a cathode and an anode, with which the battery can be charged and discharged. The electrode assembly is formed with a structure in which a cathode and an anode are stacked with a separator interposed therebetween. For example, the electrode assembly is formed in a jelly-roll type structure or a stack type structure. The cathode and anode of the electrode assembly may be formed such that the cathode electrode tap and the anode electrode tap protrude directly outward from the battery. In another aspect, the cathode and anode of the electrode assembly may be formed such that the cathode electrode tap and the anode electrode tap are connected to additional electrode leads, and these electrode leads protrude outward from the battery. . There are no particular restrictions on the protruding direction of the electrode tap or electrode lead. For example, the electrode taps or electrode leads may protrude together from the upper end of the battery, or if the electrode taps or electrode leads are provided on opposite sides, they may protrude from the upper end and the lower end of the battery. Alternatively, the electrode tap or the electrode lead may protrude from each of the upper end and the side portion of the battery so as to be perpendicular to each other.

  The region (molding region) where the molding member is formed by insert injection molding may change depending on the structure of the battery cell. For example, the molding region may be a cap assembly region that includes a protection circuit attached to the upper end of the cell body of the battery cell. In this case, the cap assembly is formed integrally with a part of the outer surface of the battery cell (for example, the upper end of the battery cell and a region adjacent to the upper end of the battery cell) or the entire outer surface of the battery cell.

  As another example, the molding region formed by insert injection molding may be an outer sealing region of the battery cell. A molded part having a predetermined thickness may be formed in the seal region by insert injection molding. The molded part increases the mechanical strength of the battery case and increases the sealing force in the sealing region. Further, the molded part provides structural stability when a plurality of secondary batteries are stacked on top of each other to produce a medium or large battery pack. Details of the secondary battery including such a molded part are disclosed in Korean Patent Application No. 2005-0047765 filed in the name of the applicant of the present application. It is assumed that the contents disclosed in this patent application are included in this specification by touching this patent application.

  The material for filling the molding region is not particularly limited as long as the material for filling the molding region is a liquid material that can be used in insert injection molding. For example, the material for filling the molding region may be a molten thermoplastic polymer, a thermosetting and / or ultraviolet curable solution, or a liquid dehydrating effect compound. When the material for filling the molding region is a liquid material, the material for filling the molding region may be provided in various states such as a monomer, an oligomer, a paste, and a molten polymer. In some cases, the material for filling the molding region may contain a filler such as a reinforcing fiber for improving the strength.

  The elastic member serves to support the cell body of the battery cell and at the same time serves to prevent the insert injection molding material from being injected from the molding area to the other area (the “non-molding area”). For this purpose, the elastic member is formed on the inner surface of the mold so that the elastic member contacts the cell body of the battery cell when the elastic member surrounds the molding region. Preferably, the elastic member is formed on the inner surfaces of the upper and lower molds. The elastic member may be formed in another region other than the molding region, that is, in the entire non-molding region, or may be formed along the outer peripheral surface of the non-molding region in contact with the molding region.

  When the upper and lower molds are in close contact with each other with the battery cells attached to the upper and lower molds, the cell body of the battery cell is supported by the elastic member inside the mold, leaving the molding area empty. It is. An injection port is formed in the mold, and insert injection molding material is injected into the molding region through these ports. Thus, insert injection molding is performed.

  The elastic member is not particularly limited as long as it is made of a material that can apply a flexible elastic force. For example, the elastic member may be formed of natural rubber or synthetic rubber. In some cases, the elastic member may be covered with an inert protective film to protect the elastic member from the insert injection molding material.

  According to another aspect of the present invention, a secondary battery manufactured by a secondary battery manufacturing apparatus having the above-described structure is provided.

  The secondary battery according to the present invention is a battery having a molded member formed at least partially by insert injection molding. Preferably, as described above, the secondary battery according to the present invention has a molded portion having a predetermined thickness so that the secondary battery can be used as a unit cell for a middle- or large-sized battery pack. A pouch-shaped battery formed in the outer seal area may be used.

  Preferably, the molded part is at least partially formed in the outer seal area of the battery case. In addition, the molded part increases the sealing force in the sealing area, so that moisture does not penetrate and the electrolyte does not leak. In general, when the upper and lower battery cases formed in a laminated structure are sealed to each other, the contact areas of the upper and lower battery cases are attached to each other by applying heat and pressure to the contact areas of the upper and lower battery cases. Therefore, when the molding portion is formed in the seal region so that the molding region is surrounded by the molding portion, the sealing force is further increased. In a preferred embodiment, the molded part may be formed on both side sealing areas of the battery case. In another aspect, the molded portion may be formed in both side seal regions, top seal regions, and / or bottom seal regions of the battery case. Molded portions formed in the upper end seal region and the lower end seal region of the battery case serve to increase the sealing force of the pouch-shaped battery and to increase the mechanical strength of the pouch-shaped battery.

  Preferably, the thickness of the molded part is thicker than the cell body of the battery cell. In this case, the batteries can be stably stacked on each other, and the batteries can be separated from each other by a predetermined distance by the molded portion. As a result, a shock absorbing region for accepting a change in thickness of the battery cell body during charging and discharging of the battery is formed, and further, the cell body of the battery cell is generated during charging and discharging of the battery. A coolant flow channel is formed to remove heat. The coolant is a material for radiating heat from the cell body of the battery cell. For example, the coolant may be air or a liquid.

  In a preferred embodiment, the molded part extends over the entire sealing area on both sides of the battery case and thus provides structural stability when multiple secondary batteries are stacked on each other when manufacturing a medium or large battery pack. The property is further improved. In some cases, a molded part may be formed over the entire sealing area on both sides of the battery cell, and at the same time, an additional molded part similar to the molded part described above may be added to the upper end part of the battery case and / or Or you may connect with a lower end part.

  The molded part may be formed along the outside of the battery case so that the molded part has a predetermined thickness, but the molded part may be provided with at least one recess having a relatively small thickness. Good. When a plurality of batteries are stacked on top of each other to form a battery pack, the depression forms at least one uniform coolant flow channel.

  In some cases, when a plurality of secondary batteries are stacked on each other to manufacture a middle- or large-sized battery pack, the stacked batteries are more easily connected and / or the stacked batteries are connected to the battery pack inner member ( For example, one or more connecting portions selected from the group consisting of a connecting step, a connecting groove, and a through hole may be formed in the molded portion so that the molded portion can be fixedly attached to the battery pack housing. You may change the position of a connection part according to a connection aspect.

  These and other objects, features and other advantages of the present invention will become apparent upon reading the following detailed description with reference to the accompanying drawings.

  Next, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be noted that the scope of the present invention is not limited to the illustrated embodiments.

  2 to 4 are perspective views illustrating a secondary battery according to an embodiment of the present invention that can be manufactured using the apparatus according to the present invention.

  Referring to FIG. 2, the secondary battery 100 includes an electrode assembly (not shown) between a two-unit pouch-shaped battery case 140 and a cathode lead 110 and an anode lead 120 protruding from the upper and lower ends of the battery 100. When attached, both side portions, the upper end portion 144, and the lower end portion 146 are configured to be sealed. A film-like seal member 160 is disposed between the electrode leads 110 and 120 and the battery case 140 in order to improve the sealing performance between the electrode leads 110 and 120 and the battery case 140. A molded portion 200 that is slightly thicker than the battery cell 130 is formed in both side seal regions of the battery 100 so as to extend evenly along both sides of the battery 130. The side molding portion 200 further increases the mechanical strength of the battery 100 at the same time as further increasing the sealing force in the relatively weak both-side sealing regions. Further, the molded part 200 serves as a frame when a plurality of secondary batteries 100 are stacked on each other to produce a high-output, large-capacity medium- or large-sized battery pack.

  Referring to FIG. 3, the secondary battery 101 shown in FIG. 3 is different from the secondary battery 100 shown in FIG. 2 in that a plurality of depressions 231 are formed in the side molded portion 201. The recess 231 means a relatively thin region of the side molding portion 201. The number of the depressions 231 is not particularly limited. When a plurality of secondary batteries 101 serving as unit cells are stacked to form a middle- or large-sized battery pack (not shown), the depressions 231 disposed on both sides of each secondary battery 101 cause the side of the secondary battery. A coolant flow channel is formed in the direction. On the other hand, no additional molded part is formed in the sealing region of the upper end portion 144 and the lower end portion 146 of the secondary battery 101, and therefore wider than the coolant flow channel formed in the lateral direction of the secondary battery. A coolant flow channel is formed along the length of the secondary battery.

  Referring to FIG. 4, the secondary battery 102 shown in FIG. 4 is a modification of the secondary battery 101 shown in FIG. Recesses 232 are formed in the upper and lower molded portions 212 and 222 of the secondary battery 102. When a plurality of secondary batteries 102 serving as unit cells are stacked on each other to form a middle- or large-sized battery pack (not shown), the upper and lower sides of each secondary battery 101 are arranged in a manner similar to the lateral direction of the secondary batteries. A coolant flow channel is formed in the length direction of the secondary battery by the depression 232 formed at the end.

  The side molded parts 200, 201, and 202, the upper molded part 212, and the lower molded part 222 of the secondary batteries 100, 101, and 102 shown in FIGS. 2, 3, and 4 are a kind of molded member. Corresponds to the “molding area” of the mold during insert injection molding.

  5 and 6 show an upper die and a lower die constituting an apparatus for manufacturing a secondary battery according to a preferred embodiment of the present invention, respectively. To help understanding, the lower mold is shown in FIG. In this figure, the battery cell is attached to the lower mold. Furthermore, the mold shown in FIGS. 5 and 6 is basically formed so as to manufacture the secondary battery shown in FIG. However, in order to facilitate understanding, in this embodiment, a battery cell having an electrical lead formed at the upper end is used.

  Referring to these drawings, a mold for manufacturing a secondary battery includes a pair of upper and lower molds 300 and 400 that can be connected to each other and separated from each other. A shape corresponding to the outer surface of the battery cell 500 is formed on the inner surfaces of the upper and lower molds 300 and 400. Elastic members 310 and 410 for supporting the cell main body 510 of the battery cell 500 are formed at the centers of the inner surfaces of the upper and lower molds 300 and 400, respectively.

  The side molding parts 200, 201, and 202, the top molding part 212, and the bottom molding part 222 shown in FIG. 2, FIG. 3, and FIG. And molding regions 320 and 420 formed deep in the inner surface of 400.

  During the insert injection molding, the upper and lower molds 300 and 400 are separated from each other and closely connected to each other, and the guide bar 340 formed on the frame 330 of the upper mold 300 is connected to the frame of the lower mold 400. It engages with a guide hole 440 formed in 430. When the upper and lower molds 300 and 400 are closely connected to each other, the upper and lower molds are passed through injection ports 350 and 450 formed on one side of the upper mold 300 and one side of the lower mold 400, respectively. Molten resin is injected into the molds 300 and 400.

  In the molding regions 320 and 420, a plurality of protrusions 360 and 460 are formed. The height of these protrusions is smaller than that of the elastic members 310 and 410. Protrusions 360 and 460 form depressions 232 (see FIG. 4).

  7 is a longitudinal sectional view taken along the line AA in FIG. 5, and FIG. 8 is a longitudinal sectional view taken along the line BB in FIG.

  Referring to FIG. 7, the elastic member 310 is formed at the center of the inner surface of the upper mold 300. The guide bar 340 extends upward from the upper mold 300 so that the elastic member 310 has a predetermined height. A battery cell (not shown) contacts the upper end surface of the elastic member 310. Accordingly, the upper end surface of the elastic member 310 forms a non-molding region 370, and adjacent regions on both sides of the elastic member 310 that are not in contact with the battery cell form a molding region 320.

  Referring to FIG. 8, the elastic member 410 is formed at the center of the inner surface of the lower mold 400 so that the elastic member 410 has a predetermined height in the same manner as in FIG. The battery cell 500 is attached to the upper end surface of the elastic member 410. The contact area of the cell body 510 is separated from the molding area 420 by the elastic member 410 at adjacent areas on both sides of the elastic member 410, and the cell body 510 of the battery cell 500 is supported by the elastic member 410. The seal areas 520 on both sides of the battery cell 500 are exposed from the molding area 420. Thus, during insert injection molding, molten material is injected into the molding region 420 and then solidified to form the side molded portion 202 shown in FIG. On the other hand, as shown in FIG. 4, a recess 232 is formed by a protrusion 460 extending from the molding region 420 to a predetermined height.

  FIG. 9 is a perspective view showing a lower mold having another structure which is a modification of the lower mold shown in FIG.

  The lower mold 401 shown in FIG. 9 is different from the lower mold 400 shown in FIG. 6 in that a hollow structure is formed in the central region of the elastic member 411 formed on the inner surface of the lower mold 401. Yes. Specifically, only the outer peripheral region of the elastic member 411 protrudes upward, and therefore, the elastic member 411 has a battery cell (not shown) such that only the protruding outer peripheral region 481 contacts the cell body of the battery cell. Support). However, the protruding outer peripheral region 481 of the elastic member 411 is configured to form a closed curved surface. Therefore, the molten resin is prevented from being poured into the non-molding region 471 of the lower mold 401.

  As described above, secondary battery manufacturing devices can be formed with various structures according to the present invention.

  While the preferred embodiment of the invention has been disclosed for purposes of illustration, various modifications, additions and substitutions may be made without departing from the scope and spirit of the invention as disclosed in the appended claims. Will be understood by those skilled in the art.

  As is apparent from the above description, the present invention provides a battery case when the mold is brought into close contact with the cell body of the battery cell during insert injection molding in order to form a molding member in a specific area of the secondary battery. An apparatus for manufacturing a secondary battery that prevents the battery case from being damaged by contact between the mold and the mold, and prevents insert injection molding material injected into the molding area from being injected into the non-molding area. provide.

FIG. 1 is a perspective view showing a conventional exemplary pouch-shaped battery. FIG. 2 is a perspective view showing a secondary battery according to an embodiment of the present invention, which can be manufactured using the apparatus according to the present invention. FIG. 3 is a perspective view showing a secondary battery according to an embodiment of the present invention, which can be manufactured using the apparatus according to the present invention. FIG. 4 is a perspective view showing a secondary battery according to an embodiment of the present invention, which can be manufactured using the apparatus according to the present invention. FIG. 5 is a perspective view showing an upper mold constituting an apparatus for manufacturing a secondary battery according to a preferred embodiment of the present invention. FIG. 6 is a perspective view showing a lower mold constituting an apparatus for manufacturing a secondary battery according to a preferred embodiment of the present invention. FIG. 7 is a longitudinal sectional view taken along line AA of FIG. FIG. 8 is a longitudinal sectional view taken along line BB in FIG. FIG. 9 is a perspective view showing a lower mold having another structure which is a modification of the lower mold shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Secondary battery 110 Cathode lead 120 Anode lead 130 Battery cell 140 2 unit pouch-shaped battery case 144 Upper end part 146 Lower end part 160 Film-like sealing member 200 Molding part

Claims (12)

In an apparatus for manufacturing a secondary battery by performing insert injection molding on a part of a battery cell when the battery cell is in a mold,
The device is
Including a pair of upper and lower molds formed in a shape corresponding to the battery cell,
Elastic members are provided on the inner surfaces of the upper and lower molds,
The said elastic member is comprised as a structure which isolates a non-molding area | region from a shaping | molding area | region while supporting the cell main body of the said battery cell, when the said battery cell is attached to the said upper and lower metal mold | die. The apparatus of claim 1.
The battery cell is a pouch-shaped battery having a battery case made of a laminate sheet. The apparatus of claim 1.
The molding area is a cap assembly area including a protection circuit attached to an upper end of a cell body of a battery cell. The apparatus of claim 1.
The apparatus, wherein the molding region is an outer sealing region of the battery case. The apparatus of claim 1.
The elastic member is formed in the whole non-molding region, or is formed along the outer peripheral surface of the non-molding region in contact with the molding region. The apparatus of claim 1.
The said elastic member is an apparatus covered with the inert protective film for protecting this elastic member from the material for insert injection molding. A secondary battery manufactured using the device according to any one of claims 1 to 7, wherein the secondary battery is attached to a battery case including a metal layer and a resin layer, and performs charging and discharging. In a secondary battery including an electrode assembly,
A secondary battery having a predetermined thickness and including a molded part formed at least partially outside the battery case. The secondary battery according to claim 7,
The secondary battery is formed at least partially in an outer sealing region of the battery case. The secondary battery according to claim 7,
The molded part is a secondary battery formed in the both-side seal region of the battery case. The secondary battery according to claim 8,
The molded part is a secondary battery formed in the both-side seal region, the upper end seal region, and / or the lower end seal region of the battery case. The secondary battery according to claim 7,
The secondary battery is thicker than the cell body of the battery cell. The secondary battery according to claim 7,
The molded portion is provided with at least one recess having a relatively small thickness. When manufacturing a middle- or large-sized battery pack by stacking a plurality of batteries, at least one uniform coolant flow is provided by the recess. A secondary battery in which a channel is formed.

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